Detailed analysis of Russian meteor emerges

NASA now calculates that the meteor was 17 metres (56') across and weighed 10,000 ton(nes). The explosive energy was nearly 500 kilotons. (The Hiroshima bomb was 15 kilotons.)

Here's the part to make you go "Hmmmmmm:"

It was a totally ordinary rock. The "meteor was an ordinary chondrite containing olivine, sulfite and about 10% iron. The material is consistent with a stony meteoroid from the asteroid belt."

In other words, nothing special at all. There are millions more out there just like it, waiting their turn. :)

http://blogs.nature.com/news/2013/02/more-details-of-russian-meteor-emerge.html

via blogs.nature.com